Lesson 2 can be found here http://www.tes.co.uk/teaching-resource/Forces-Yr-7-Less-2-Friction-6347935/ The first lesson of this SoW, follow the link for lesson 2. Designed to encourage students to work with peers and consists of 3 similar, but differentiated activities and is great for a mixed ability or setted groups. The lesson plan is detailed enough to give all the information you need. I usually use this as a the introduction to year 7 Forces.